linux-toradex.git/drivers/usb/chipidea/ci.h, branch v5.13

usb: chipidea: udc: add software sg list support

2020-05-06T01:42:35+00:00

The chipidea controller doesn't support short transfer for sg list,
so we still keep setting IOC per TD, otherwise, there will be no interrupt
for short transfer. Each TD has five entries for data buffer, each data
buffer could be non-countinuous 4KB buffer, so it could handle
up to 5 sg buffers one time. The benefit of this patch is avoiding
OOM for low memory system(eg, 256MB) during large USB transfers, see
below for detail. The non-sg handling has not changed.

ufb: page allocation failure: order:4, mode:0x40cc0(GFP_KERNEL|__GFP_COMP),
nodemask=(null),cpuset=/,mems_allowed=0
CPU: 2 PID: 370 Comm: ufb Not tainted 5.4.3-1.1.0+g54b3750d61fd #1
Hardware name: NXP i.MX8MNano DDR4 EVK board (DT)
Call trace:
 dump_backtrace+0x0/0x140
 show_stack+0x14/0x20
 dump_stack+0xb4/0xf8
 warn_alloc+0xec/0x158
 __alloc_pages_slowpath+0x9cc/0x9f8
 __alloc_pages_nodemask+0x21c/0x280
 alloc_pages_current+0x7c/0xe8
 kmalloc_order+0x1c/0x88
 __kmalloc+0x25c/0x298
 ffs_epfile_io.isra.0+0x20c/0x7d0
 ffs_epfile_read_iter+0xa8/0x188
 new_sync_read+0xe4/0x170
 __vfs_read+0x2c/0x40
 vfs_read+0xc8/0x1a0
 ksys_read+0x68/0xf0
 __arm64_sys_read+0x18/0x20
 el0_svc_common.constprop.0+0x68/0x160
 el0_svc_handler+0x20/0x80
 el0_svc+0x8/0xc
Mem-Info:
active_anon:2856 inactive_anon:5269 isolated_anon:12
 active_file:5238 inactive_file:18803 isolated_file:0
 unevictable:0 dirty:22 writeback:416 unstable:0
 slab_reclaimable:4073 slab_unreclaimable:3408
 mapped:727 shmem:7393 pagetables:37 bounce:0
 free:4104 free_pcp:118 free_cma:0
Node 0 active_anon:11436kB inactive_anon:21076kB active_file:20988kB inactive_file:75216kB unevictable:0kB isolated(ano
Node 0 DMA32 free:16820kB min:1808kB low:2260kB high:2712kB active_anon:11436kB inactive_anon:21076kB active_file:2098B
lowmem_reserve[]: 0 0 0
Node 0 DMA32: 508*4kB (UME) 242*8kB (UME) 730*16kB (UM) 21*32kB (UME) 5*64kB (UME) 2*128kB (M) 0*256kB 0*512kB 0*1024kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=32768kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=64kB
31455 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
65536 pages RAM
0 pages HighMem/MovableOnly
10766 pages reserved
0 pages cma reserved
0 pages hwpoisoned

Reviewed-by: Jun Li 
Signed-off-by: Peter Chen

USB: chipidea: Use the correct style for SPDX License Identifier

2020-03-16T03:13:47+00:00

This patch corrects the SPDX License Identifier style in
header files related to ChipIdea Highspeed Dual Role Controller.
For C header files Documentation/process/license-rules.rst
mandates C-like comments (opposed to C source files where
C++ style should be used).

Changes made by using a script provided by Joe Perches here:
https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2019%2F2%2F7%2F46&data=02%7C01%7CPeter.Chen%40nxp.com%7Cbea69ff84b574ca6b48e08d7c8cf58cf%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637198665199494622&sdata=bk1n4%2BvnrfRS6ZDrps%2BuXiImdzaxKZ00YskBg6pjtn4%3D&reserved=0.

Suggested-by: Joe Perches 
Signed-off-by: Nishad Kamdar 
Signed-off-by: Peter Chen

usb: chipidea: handle single role for usb role class

2020-01-22T06:54:26+00:00

If usb port is configed to be single role, but usb role class
is trying to set unavailable role, don't try to do role change.

Signed-off-by: Jun Li 
Signed-off-by: Peter Chen 
Link: https://lore.kernel.org/r/20200122014639.22667-2-peter.chen@nxp.com
Signed-off-by: Greg Kroah-Hartman

usb: chipidea: add role switch class support

2019-08-28T02:39:53+00:00

USB role is fully controlled by usb role switch consumer(e.g. typec),
usb port can be at host mode(USB_ROLE_HOST), device mode connected to
host(USB_ROLE_DEVICE), or not connecting any partner(USB_ROLE_NONE).

Signed-off-by: Li Jun 
Signed-off-by: Peter Chen

usb: chipidea: Always build ULPI code

2018-07-05T06:22:47+00:00

Commit 03e6275ae381 ("usb: chipidea: Fix ULPI on imx51") causes a kernel
hang on imx51 systems that use the ULPI interface and do not select the
CONFIG_USB_CHIPIDEA_ULPI option.

In order to avoid such potential misuse, let's always build the
chipidea ULPI code into the final ci_hdrc object.

Tested on a imx51-babbage board.

Fixes: 03e6275ae381 ("usb: chipidea: Fix ULPI on imx51")
Signed-off-by: Fabio Estevam 
Signed-off-by: Peter Chen

USB: chipidea: no need to check return value of debugfs_create functions

2018-05-31T10:54:22+00:00

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Acked-by: Peter Chen 
Signed-off-by: Greg Kroah-Hartman

USB: chipidea: Remove redundant license text

2017-11-07T14:45:01+00:00

Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Thierry Reding 
Cc: Jonathan Hunter 
Acked-by: Peter Chen 
Signed-off-by: Greg Kroah-Hartman

USB: add SPDX identifiers to all remaining files in drivers/usb/

2017-11-04T10:48:02+00:00

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner 
Cc: Kate Stewart 
Cc: Philippe Ombredanne 
Signed-off-by: Greg Kroah-Hartman 
Acked-by: Felipe Balbi 
Acked-by: Johan Hovold 
Signed-off-by: Greg Kroah-Hartman

usb: chipidea: udc: update gadget state after bus resume

2017-03-15T03:30:43+00:00

Gadget state is set to be suspended when bus suspened, but not updated
after resume, this patch saves the gadget state before suspend and
restores it after resume.

Signed-off-by: Li Jun 
Signed-off-by: Peter Chen

usb: chipidea: Add support for ULPI PHY bus

2017-01-20T03:25:14+00:00

Some phys for the chipidea controller are controlled via the ULPI
viewport. Add support for the ULPI bus so that these sorts of
phys can be probed and read/written automatically without having
to duplicate the viewport logic in each phy driver.

Acked-by: Peter Chen 
Cc: Greg Kroah-Hartman 
Cc: Heikki Krogerus 
Signed-off-by: Stephen Boyd 
Signed-off-by: Peter Chen